This wall plate consists of three DB9 size openings plus four 3/8 inch holes and two standard keystones holes. It is a standard North American wall plate which accepts a variety of our DB9 style couplers or dongles (such as HDMI, VGA, USB and DisplayPort), 3/8 inch sized couplers (such as RCA, F-Type and 3.5mm) and standard keystone inserts.